Ash gate



' July 19, 1927;

J. VAN BRUNT ASH am:

Filed Sept. 5. 1924 4 Sheets-Sheet 1 INVENTOR John 1/471 Era/11"ATTORNEY "July 19. .1927.

,1. VAN BRUNT ASH GATE Filed Sept. 5. 1924 4,5heets-Shaec 2 INVENTORJo/m ln 5mm?- I I I ATTORNE .7 July 19, 1927. J. VAN BRUNT I 153F398 ASHGATE Filed- Sept. 5. 1924 4 Shee ts-Sheet 3 BY '1 I I Y I ATTORNEYPatented July 19, 1927.

warren MES" 1,636,398? P TENT oerics;

was VANBRUNT. or Fwsmaa,asw oamjassmaoa To NTERnA'rio 'AL coat BUSTIONENGINEEBINGCORPORATION, OENEWYORK; N.'Y., A CORPORATION or DELAWARE.

ASH GATE-l Application filed'september 5, 1924. Serial No. 736,016.

My'invention relates to gates for the dis-, charge-opening 1n ash-pitsof furnaces, and

has special reference to power operable gates for the ash-"pits ofautomatic stokers.

An object. of the invention is to provide a novel andimproved gate ofthis character.=

tions of partshereinafter described and.

claimed, the advantages of which will be obvious to those skilled inthe. art.

Theseveral features of the invention will be clearly understood from thefollowing description and 1 accompanying drawings, in which; 7

Figure l is alongitudinal sectional eleva tion of "an ash-gateembodying-the features of the invention in their preferredform, the

gate being shown associated with the discharge opening'in the lower endof an ashpit, and the section being taken on line'l1 of Fig. 2;

Fig. 2 is an end elevation of the construction illustrated in Fig. 1;

Fig. 3 is a longitudinal sectional view,

the line 33 of Fig. 2, partly opened position;

Fig. 4 is a detailed sect-ionalview taken on the line 4-4 of Fig. 3; and

F 5 is a view similar to Fig. 1 but of modified form, and showing thelower end of the ash-pit in elevation.

The gate illustrated in the drawings is shown associated with the lowerend "of an ash-pit 2 having the usual discharge opening 4 therein. Asshown, a rectangular frame 6 surrounds the lower end of the wall of thedischarge opening in the ash-pit, and

is provided with upstanding flanges 8 en'1-" bracing the inner and outersides of the wall, the frame being provided with a depending flange 10that defines the discharge opening of the ash-pit. I

In the illustrated construction the gate comprises a casting-12 havingan'outer up;

standing flange l4 and a central rib 15,th'espaces between theribsbeingfi-lled with fire brick or: othersuitable heat insulating material-l6. The gate is of suitable area sothat when it is in closedposition as shown in Fig.

1, it will extend overand close the discharge I opening in the ash-pit,the flange 14 of the gate tightly engaging the lower end of thedepending flange 10 ofthe frame6. The gate is mounted upona horizontallymovable carrier" 16;,which is adapted to be moved 10a,

gitudinally to carrythegate into andout 50f position'beneath thedischarge opening in the ash pit, and means is provided for raisingthegate to closed posi-tionwhen it has been moved beneath the dischargeopening, and" for loweringzthe gatewa distance below the dischargeopeningpreviously to the start of the retracting movement of thecarrier.

The carrier lfi'comprises a pair of long'itudinally extending:oast-ingsor beams 18"" which aresecured together by suitably arrangedchannel irons 20. The ends of the beams are provided with transversebearings 22, the bearings at the corresponding ends of thebeams beingini alin ement and receivingrock shafts 24. Each shaft 24'is furthersupported by bearings 26 formed on brackets 28'that are secured totheadjacent channel irons 20. The shaftsQ textendbeyondthe bearingsQQandhave flanged wheels 30 journaled 011 their ends. The wheel'sl30 rideonthe lower flanges off'chan-nelirons or tracks- )artl in elevationtaken substantiall on" showing-the gate 111"" 32by means. of a fluidoperatedj'piston rod EEG-associated withthe rearendthereof. The

connection betw-eenthe carrier'and the pisv ton rod 36 comprisesalongitudinally ex; tending-bar38', which is arranged centrally: ontheunder side of the carrier. This bar 38 5 is provided with alongitudinally extending and upwardly opening inverted T-sha'ped slot 40which receives the lower portion "of a-horizontsil rail 1-2 having itsendsbolted to the under sides of the channel irons- 20, I

saidlowerportion'of the rail 42 correspondingin shape'to theslot'40yandsaidrbar be-; ing in slidingenga'geinent therewith. Each. end of thesliding bar '38 is bifurcated and receives the lower end of a} lever44', each lever being provided with a transverse pin 46 which isreceived in vertical slots 48 in the bifurcated end. The upper ends ofthe arms 44 are centrally secured on the rockshafts 24 respectively. Twoarms 50 are secured oneach shaft 24 adjacent the outer ends of thebearings 26 of the shaft. The upper ends of the arms 50 are providedwith cam rolls 52 which are adapted to engage bearing surfaces 54 on theunder side of the casting 12 of the gate, each bearing surface extendingbetween depending flanges 56 for receiving the upper end of the arm 50between them. Hangers 58 are bolted to the under side of the casting 12of the gate, the lower ends of which are bifurcated and extend over theshafts 24, there being two such hangers 58 associated with each shaft 24and arranged adjacent theshaft bearings 22 on the beams 18. Each arm 50is provided with an upstanding projection 60 which supports the gatewhen the latter is in the partially opened position as shown in Fig. 3,the supporting surfaces 54 resting upon the upper ends of theprojections 60. The carrier bar 38 is provided with a rearwardprojection 62 which isconnected with the piston rod 36 by a pivot pin64. When the gate is in its advanced position as shown in both Figs. 1and 3, a projection 66 on the forward end of the gate is in engagementwith a downwardly projectin stop lug 68 on the frame 6.

Vith the gate in closed position as shown in Fig. 1, it is tightly heldup against the flange 10 of the frame 6 by means of the cam rolls 52.WVhen it is desired to open the gate the piston rod 36 is retractedwhich acts to shift the sliding bar 38 rearwardly which in turn throughthe depending arms 44, rocks the shafts 24 in a counter clockwisedirection which swings the arms 50 downwardly and forwardly to bringtheir cam rolls 52 awayfrom the supporting surfaces 54. This movement ofthe cam rolls 52 permits the gate 16 to be gradually lowered by gravityuntil -.it engages the upper ends ofv the arm projections 60 whichlimits its downward movement, the bifurcated ends of the guiding hangers58 guiding the gate during this lowering movement thereof. During thecontinued retracting movement of the piston rod 36 the bar 38 travelswith the rod and acts through the arms 44, shafts 24 and arms 50 to movethe carrier 16 therewith, the arms 50 being held from further turningmovement by the weight of the gate on the ends of the projections 60.The carrier is thus moved a' sufiicient distance to move the ash-gateout from beneath the lower end of the discharge opening of the ash-pitso as to permit the contents of the ash-pit to be discharged therefrom.

When it is desired to move the gate into closed position, the piston rod36 is advanced and acts through the shifting bar 38, arms 44, androck-shafts 24 to move the carrier and the gate therewith, the weight ofthe gate 011 the upward projections 60 holding the rock-shafts 24 fromturning movement T at this time. This advancing movementof the gatecontinues until the projection 66 on the forward end thereof engages thestop lug 68 which arrests the movement of the gate so as to position itdirectly beneath the discharge opening of the ash-pit. During thecontinued advancing movement of the piston rod 36 after engagement ofthe projection 66 with the stop 68, the shifting bar 38 acts through thearms 44 and rock-shafts 24 to swing the cam roll arms 50 upwardly, whichcauses the cam rolls 52 to act on the bearing surfaces 54 to force theash-gate upwardly against the flange 10 of the discharge opening of theash-pit, so as to tightly and firmly close the opening. The ash-gate isheld in closed position by the cam rolls 52, the axes of which arepositioned directly above the axes of the shafts 24.

It will be apparent with this construction, whereby the ash-gate inopening that dropped a distance below the discharge opening before it ismoved from beneath the discharge opening, and in closing is firstreturned to said position below the dis charge opening before it isbrought against the lower end of the opening, that the opening andclosing of the gate is easily accomplished without danger ofinterference from ashes in the ash-pit, and the ash-gate when in closedposition tightly and firmly seals the discharge opening.

Inthe modified construction illustrated in Fig. 5, instead of theraising and lowering of the gate being accomplished by means of the camrolls 52, such movement is effected by means of arms '70 having theirlower ends secured to the rock-shafts 24 and their upper ends pivotallyconnected with pivot pins 72 secured. in depending ears 74 on the underside of the gate. \Vith this construction, at the start of theretracting movement of the piston rod 36 to open the gate, therockshafts 24 during their turning movement in a counter clockwisedirection swing the ends of the arms downwardly and thus lower the gatepreliminary to the continued retracting movement of the piston rod 36 tomove the gate carrier and gate from beneath the discharge opening oftheash-pit. On engagement of the projection 66 with the stop lug 68 nearthe limit of the advancing movement of the piston rod 36 to move thegate into closed position, the shifting bar 38 acts through thedepending arms 44 on the rock-shafts 24 to turn the rock-shafts you in aclockwise direction and thus act through i tion at the completion ofthis movement by the axes of the pivotal connections between the arms 70and the ears 7 4 on the gate being positioned directly above the axes ofthe rock-shafts 24-.

As will be evident to those skilled in the art, my invention permitsvarious modifications without departing from the spirit thereof or thescope of the appended claims.

hat I claim is: i

1.. The combination of an ash pit having a discharge opening, and meansfor closing said opening comprising a gate, a carrier for moving thegate into and out of position beneath said opening, a stop for limitingsaid inward movement of the carrier, and means acting automatically uponthe carrier reach ing the limit of said movement to raise said gate withrelation to the carrier toward said opening.

2. The combination of an ash-pit having a discharge opening, andmeansfor closing said opening comprising a gate, a frame surrounding thelower end of the wall of said opening having a depending stop member,means for moving the gate beneath said opening and against said stopmember, and means acting automatically upon engagement of the gate withthe stop member for effecting the raising of the gate towards saidframe.

The combination of an ash-pit having a discharge opening, and means forclosing said opening comprising a gate, a carrier therefor movablehorizontally to move the gate into and out of position beneath saidopening, arms pivotally mounted on the carrier beneath the ends,respectively, of said gate and acting when turned simultaneously in onedirection to raise said gate, and means' for thus turning said arms.

4.. The combination of an ash-pit having a. discharge opening, and meansfor closing said opening comprising a gate, a carrier therefor movablehorizontally to move the gate into and out of position beneath saidopening, levers pivotally mounted on the carrier beneath the ends,respectively, of said gate and acting when turned simultaneously in onedirection to raise said gate, and means comprising a horizontally'movable bar connecting said levers for thus turning them. 1

5. The combination of an ash-pit having a discharge opening in its lowerend, and.

means for closing said openinrr comprising a gate, a carrier therefor,movable in opposite directions to move the gate into and out of positionbeneath said opening, means for raising said gate towards said openingwhen it is moved into position beneath said opening, comprising armspivotally mounted on the carrier beneath the ends, respectively of thegate, cam rolls mounted on the upper ends of said arms and adapted toact on the under side of the gate to raise the gate upon turningmovement of the arms in one direction, and means for thus turning saidarms.

6. The combination of an ash-pit having a I discharge opening, and,means for closing said opening comprising a gate, a carrier thereformovable horizontally to move the gate into and out of position beneathsaid opening, a. bar mounted for limited longia discharge opening, andmeans for closing said opening comprising a gate, a carrier for movingthe gate into and out of position be neath said opening, stop adapted tobe engaged by the gate to limit said movement of the gate and carrier,and meansacting automatically npon engagement of the gate with said stopto raise said gate with relation to the carrier toward said opening.

8. The combination of an ash pit having a discharge opening and meansfor closing said opening comprising a gate, means for moving the gateinto and out of position beneath said opening, a stop for limiting theinward movement of the gate, and means acting automatically upon thegate reaching the limit of its inward movement to raise said gate towardsaid opening.

9. The combination of an ash pit having adischarge opening, and meansfor closing said opening comprising a gate, means for moving the gateinto and out of position beneath said opening, a combined stop andguiding member for the gate for limiting the inward movement of the gateand for guiding the gate while it, is being raised toward said opening,and means acting automatically upon the gate reaching said limit of itsinward movement to raise it toward said opening.

10. The combination of an ash pit having a discharge opening, and meansfor closing said opening comprising a gate, a carrier therefor to movethe gate into and out of a definite position beneath said opening, saidgate extending directly overvthe top of said carrier, and means actingautomatically up-' on the gate reaching said definite position beneathsaid opening to raise it with relation to the carrler toward saidopening.

'JOHN VAN BRUNT.

llo

